Tire truing device



Aug. 25, 1953 F. |.;.`ANDERsoN ET AL 2,649,655

TIRE TRUING( DEVICE Filed Aug. 14, 1952 Patented Aug. 25,' 1953 UNITED STATES TIRE TRUING DEVICE Farrel L. Anderson and Glenn Bowers, Bird City, Kans.

Application August 14, 1952, Serial No. 304,298

4 Claims.

This invention relates to an automotive wheel truing device, and has for its principal object the provision of an economical, portable and highly efficient mechanism which can be placed beneath the wheel of a vehicle, while the latter is in place on the vehicle, and which will act to rapidly and accurately remove all high spots or bumps from the tire tread .to bring the riding surface of the tire tread to a perfect smooth concentric condition, and to bring the wheel into a balanced condition.

Another object of the invention is .to so construct the device that it may be easily and accurately adjusted to remove the proper amount of material from the tire tread and to accurately center the tread on the tire.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, and economy, and efcency. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is a plan view of the improved tire truing device;

Fig. 2 is a left side view thereof, illustrating the position of a conventional vehicle wheel in broken line;

Fig. 3 is a detail section through a gear box employed on the improved tire truing device taken on the line 3 3, Fig. l;

Fig. 4 is a cross section taken on the line 4 4, Fig. 1; and

Fig. 5 is a right side view of the truing device.

The improved tire truing device is mounted on an open, rectangular base frame consisting of two longitudinal frame members I0, held in spaced relation by means of cross frame members II. A transversely-extending idler` roller I2 is supported in suitable bearings I3 mounted on the frame members I0. The idler roller I2 is positioned transversely of the frame and adjacent one extremity thereof. A drive roller I4 is fixedly mounted on a roller shaft I5 positioned intermediate the length of the frame I and parallel to the idler roller I2 in suitable shaft bearings I6.

A drive gear I1 is mounted on the roller shaft I and meshes with a toothed drive pinion I8 mounted on a gear shaft I9. The gear I1 and the pinion I8 are mounted in a gear housing 20 which is hingedly mounted on the extremity of the roller shaft I5. The gear shaft I9 extends outwardly from the housing 20 adjacent the upper extremity thereof. A belt pulley 2l is mounted on the shaft I9 and is driven by means of a transmission belt (preferably a V-belt) 22. The belt 22 is trained round a drive belt pulley 23 on a motor shaft 24 extending from an electric drive motor 25.

The drive motor 25 is mounted on a carriage plate 26. Two parallel, transversely extending, guide tubes 21 are welded or otherwise secured on the bottom of the plate 26. These tubes are slidably mounted on transversely extending guide rods 28. The guide rods 28 are attached at their extremities to sliding sleeves 29. The sleeves 29 are slidably mounted on parallel, longitudinally-extending guide rods 30.

Thus, it can be seen that the carriage plate 26 can be transversely moved on the cross rods 28 and that it can be longitudinally moved on the guide rods 30. The longitudinal movement of the carriage plate is accomplished by means of an adjusting screw 3I which is threaded through a threaded nut 32 supported from one of the cross frame members II and terminating in an ear 33 formed on one of the sliding guide sleeves 29. Transverse movement of the carriage plate is accomplished by means of a jack screw 34 threaded through a nut 35, iixedly supported from the other sliding sleeve 29.

The extremity of the jack screw 34 is rotatably mounted in an upturned side flange 36 on the carriage plate 26. A similar side flange 31 is turned upwardly on the opposite side of the carriage plate. The side flanges 34 and 35 support a horizontal grinder shaft 38 in suitable bearings 39. A concave abrasive roller 40 is mounted on the grinder shaft 38. The roller 40 may be formed from carborundum or other abrasive material or may be formed of any desired material covered with abrasive material.

The grinder shaft 38 extends outwardly beyond one of the bearings 39 terminating in a driven pulley 4I which is driven by means of a second drive belt 42, from a second drive pulley 43 on the motor shaft 24. A tension spring 44 extends from the gear housing 20 to an attachment pin 45 on one side frame member I0 to constantly urge the gear shaft I9 away from the motor shaft 24 to maintain the drive belt 22 taut.

In use, the wheel to be trued, indicated at 46, is driven onto the rollers I2 and I4. The motor 25 is then started so as to cause the drive roller to always maintain the proper tension in the drive belt 22.

While a specific form of the improvenieril-iasbeen described and illustrated herein, ,itis desired Y to be understood that the sam'l'n'ay' b varied" within the scope of the appended claims, Without departing from the spiritid-'th'el invention Having thus described the invention,v what is claimed and desired secured by Letters Patent'sx' l. A tire truing device for automotive wheels comprising: a bas'e' frame; an idler roller rotatably supported fromsaid frame and extending transversely adjacent one extremity or' the'latter; a drive roller rotatablysupportedby said base frame in parallel spacedV relation' to said idler roller, said rollers' being adapted to support a vehicle wheel therebetween; an abrasive roller supported from sa'i'd parallel frame toY saidrst rollers; a motor; means for driving said abrasive roller from said motor; a' carriagev plate upon which said motor is mounted; transversely' eX- tending, tubular 'supporting member on` said carriage plate; transversely extending guidelrnein'- bers supported from said frame and passing through said tubular memb'e'r'asaid' tubular members being' slidable on` saidguideA members whereby said motor may b'e adjust'edlaterally'; and means for" moving' said"carriag'fe'V plate longitudinally.

2. A tire truing device as described in claim 1 having elongated sleeves secured to the extremities of said guide members at right angles to the latter; guide bars supported from said frame and extending through said sleeves; and means for moving said sleeves longitudinally of said frame for adjusting the longitudinal position of said carriage plate. I

3'. A tire-truirig device? asdescribedin'f claim 2 having means for rotatably supporting said abrasive roller from said carriage plate; an adjustingwscrew for changing the longitudinal positinldisa'id carriage plate; and a second adjust- Y)ingl screw for vadjusting the transverse position of 'said' carriage" plate.

4. A tire truing device as described in claim 3 hairig'a'f driveshaft extending oppositely outwardtrom the extremities of said drive roller; a gear mounted on said drive shaft; a toothed pinion in mesh with said gear; a gear shaft eX- ten'ding' from said'toothed pinion; a gear housing surrounding said` gear' and"- pinion andro'- tatably mounted: on said drive shaft; a" pulley carried by said gear shaft; a belt transmitting power from said motor to' said: gear' sha'ft; and means urging said' gearr shaft' away from' said motor' shaft.

FARRlEL'L. ANDERSON GLENN BOWERS?.

References Citedin the file of this patent UNITED STATESL PATENTS- Numb'er Name' Date" 421,377 Barr Feu-18; 1890 2,215,403 1vmciowan"- sept'. 17", 194%0 2;,54'6225 Juliann et ai. Mar. 27, 1951 

